Hi! I am Danielle and our Survey Of College Algebra class participated in our Web Project #2 at Lambert's Airport in the East terminal on the speed ramps. Our purpose was to time eleven students on the time it took them to get from one end of the speed ramp to the other end with just standing while the speed ramp moved the students. The following results give an average time of how fast the ramp moves. Also the varience from the average eleven students is listed as well.

The length of the speed ramp is 279 feet 10 and 1/2 inches. The following times are from the start to finish of this length speed ramp, again with just students standing on it,not walking on it.

1.   2 min. 17.435 sec
2.   2 min. 17.78 sec.
3.   2 min. 17.99 sec.
4.   2 min. 18.04 sec.
5.   2 min. 18.07 sec.
6.   2 min. 18.105 sec.
7.   2 min. 18.15 sec.
8.   2 min. 18.15 sec.
9.   2 min. 18.29 sec.
10. 2 min. 18.34 sec.
11. 2 min. 18.71 sec.

The next set of numbers of the eleven students times in seconds.

1.   137.435 sec.
2.   137.78 sec.
3.   137.99 sec.
4.   138.04 sec.
5.   138.07 sec.
6.   138.105 sec.
7.   138.15 sec.
8.   138.15 sec.
9.   138.29 sec.
10. 138.34 sec.
11. 138.71 sec.

The following data is the varience of each student's time to the average or mean of the group data which is the mean or average # of 138.096sec. or 2min and 18.096 sec.

1.   137.435 sec. - 138.09 6sec. = -0.661 sec.
2.   137.78 sec. - 138.096 sec. = -0.316 sec.
3.   137.99 sec. - 138.096 sec. = -0.106 sec.
4.   138.04 sec. - 138.096 sec. = -0.056 sec.
5.   138.07 sec. - 138.096 sec. = -0.026 sec.
6.   138.105 sec. - 138.096 sec. = 0.009 sec.
7.   138.15 sec. - 138.096 sec. = 0.054 sec.
8.   138.15 sec. - 138.096 sec. = 0.054 sec.
9.   138.29 sec. - 138.096 sec. = 0.194 sec.
10. 138.34 sec. - 138.096 sec. = 0.244 sec.
11. 138.71 sec. - 138.09 sec. = 0.614 sec.

After comparing all the data of the class average of 138.096sec. and the individual times of the students, Nanyell and I (Danielle) took our own times down from standing on the speed ramp and compared our times to the other students' times and the class average. These are the results the Nanyell and I got and our deviance from the class mean as shown below.

Nanyell's varience 137.795 sec. - 138.186 sec. = -0.391 sec.
Danielle's varience 137.862 sec. - 138.096 sec. = -0.234 sec.

After analyzing and comparing all the data from this experiment and then testing it with personal results it is safe to conclude that the speed of the speed ramp at Lambert Airport's East terminal will most of the time be within a one second variance of 1 second from the average speed of 2min. and 18.096 sec. for the length of belt that is 279feet and 10 and 1/2inches.

TIME IN MINS & SECS     TIME IN SECONDS           VARIANCES (TIME - AVERAGE TIME)
      2     17.780                               137.780                         -0.406
      2     18.700                               138.700                         +0.514
      2     18.400                               138.400                         +0.214
      2     18.290                               138.290                         +0.104
      2     18.150                               138.150                         -0.036
      2     18.710                               138.710                         +0.524
      2     17.435                               137.435                         -0.751
      2     18.105                               138.105                         -0.081
      2     18.340                               138.340                         +0.154
      2     17.990                               137.990                         -0.196
      2     18.150                               138.150                         -0.036
                              TOTAL         1,520.050                         +0.004

AVERAGE = TOTAL SECONDS/NUMBER OF DATA = 1,520.05/11 = 138.186 SECONDS
                                                OR 2 MINUTES AND 18.186 SECONDS

CALCULATION FOR THE SPEED OF THIS WALKWAY BELT

The Formula: D = r t

279.875 ft = r 138.186 sec.

279.875 ft/138.186 sec = r 138.186/138.186

r = 279.875/138.186 (ft/sec)

r = 2.025 ft/sec

For more information and ideas about this project you may link to a page written by one of the following math artists: Danielle's First and Third Web Page, Darlene, Kellie, Jill, Nanyal, Kevin, Crystal, Rachel, Christina, Jennifer, Candice, Vincent, Esther and Melinda. Most of us are in this picture but not in order of names.